2011/5/9 Hans-Peter Diettrich <DrDiettrich1 at aol.com>: > How would you tell the users, that a column width of -2 means auto-expand? http://msdn.microsoft.com/en-us/library/bb761163%28v=vs.85%29.aspx The value of LVSCW_AUTOSIZE_USEHEADER is -2. Vincent